Accession Number : ADA116744

Title :   Transverse Effects in Optical Bistability and Superfluorescence.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH

Personal Author(s) : Watson,Edward Alan

PDF Url : ADA116744

Report Date : Jan 1982

Pagination or Media Count : 82

Abstract : The interaction of a light beam with matter has varying degrees of dependence on the transverse profile of the beam. Two topics are considered here. The first topic, superfluorescence, involves the coherent emission generated by an initially inverted two-level medium. Calculations in the past have included either quantum fluctuations in the initial conditions or transverse effects, but never both. The calculations presented here include both transverse effects and quantum fluctuations. The results of the theoretical calculations are in good agreement with previous experimental results, both quantitatively in terms of time delay averages and distributions and also qualitatively in terms of pulse shapes. The second topic considered, optical bistability, involves devices which exhibit two stable output light intensities (a high and a low branch) over a limited range of input light intensities. Simulations performed here show the effect of diffraction, measured in terms of the Fresnel number, on how much of the device becomes bistable. It was found that for small Fresnel number cases, the entire device become bistable. For high Fresnel number cases, only part of the device becomes bistable while the rest of the device remains low transmitting. The results of an experiment performed are consistent with the simulations. (Author)

Descriptors :   *Electromagnetic radiation, *Fluorescence, *Wave propagation, *Transverse, Light, Optics, Computerized simulation, Interactions, Materials, Coherent optical radiation, Electrooptics, Laser beams, Lasers, Mathematical models, Theses

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE